CVE-2021-34728 : Multiple vulnerabilities in the CLI of Cisco IOS XR Software could allow an authenticated, local attacker with a low-pri

Multiple vulnerabilities in the CLI of Cisco IOS XR Software could allow an authenticated, local attacker with a low-privileged account to elevate privileges on an affected device. For more information about these vulnerabilities, see the Details section of this advisory.

Published 2021-09-09 05:15:12

Updated 2021-09-21 16:43:14

Source Cisco Systems, Inc.

View at NVD, CVE.org

Exploit prediction scoring system (EPSS) score for CVE-2021-34728

EPSS FAQ

0.04%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 6 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-34728

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
7.2	HIGH	AV:L/AC:L/Au:N/C:C/I:C/A:C	3.9	10.0	NIST
Access Vector: Local Access Complexity: Low Authentication: None Confidentiality Impact: Complete Integrity Impact: Complete Availability Impact: Complete
7.8	HIGH	CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	1.8	5.9	Cisco Systems, Inc.
Attack Vector: Local Attack Complexity: Low Privileges Required: Low User Interaction: None Scope: Unchanged Confidentiality: High Integrity: High Availability: High
7.8	HIGH	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	1.8	5.9	NIST
Attack Vector: Local Attack Complexity: Low Privileges Required: Low User Interaction: None Scope: Unchanged Confidentiality: High Integrity: High Availability: High

CWE ids for CVE-2021-34728

CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.

Assigned by:

nvd@nist.gov (Primary)
ykramarz@cisco.com (Secondary)

Products affected by CVE-2021-34728

Cisco » Ios Xr
Versions from including (>=) 7.4.0 and before (<) 7.4.1
cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:*
Matching versions
When used together with: Cisco » Asr 9000v-v2 » Version: N/A
When used together with: Cisco » Asr 9001 » Version: N/A
When used together with: Cisco » Asr 9006 » Version: N/A
When used together with: Cisco » Asr 9010 » Version: N/A
When used together with: Cisco » Asr 9901 » Version: N/A
When used together with: Cisco » Asr 9902 » Version: N/A
When used together with: Cisco » Asr 9903 » Version: N/A
When used together with: Cisco » Asr 9904 » Version: N/A
When used together with: Cisco » Asr 9906 » Version: N/A
When used together with: Cisco » Asr 9910 » Version: N/A
When used together with: Cisco » Asr 9912 » Version: N/A
When used together with: Cisco » Asr 9922 » Version: N/A
Cisco » Ios Xr
Versions before (<) 7.3.2
cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:*
Matching versions
When used together with: Cisco » Asr 9000v-v2 » Version: N/A
When used together with: Cisco » Asr 9001 » Version: N/A
When used together with: Cisco » Asr 9006 » Version: N/A
When used together with: Cisco » Asr 9010 » Version: N/A
When used together with: Cisco » Asr 9901 » Version: N/A
When used together with: Cisco » Asr 9902 » Version: N/A
When used together with: Cisco » Asr 9903 » Version: N/A
When used together with: Cisco » Asr 9904 » Version: N/A
When used together with: Cisco » Asr 9906 » Version: N/A
When used together with: Cisco » Asr 9910 » Version: N/A
When used together with: Cisco » Asr 9912 » Version: N/A
When used together with: Cisco » Asr 9922 » Version: N/A

Vulnerability Details : CVE-2021-34728

Exploit prediction scoring system (EPSS) score for CVE-2021-34728

CVSS scores for CVE-2021-34728

CWE ids for CVE-2021-34728

References for CVE-2021-34728

Products affected by CVE-2021-34728